An M with a small letter or set of letters above it stood for tens of thousands and higher. (Confusingly, in this instance the M represented the Greek ancestor of “myriad,” not the number 40.) ...

Archaeologists have unearthed a “spectacular” ancient temple housing hundreds of statues dedicated to the Greek God Apollo.

Instead, this letter has its origin in an ancient Greek symbol called a 'Christogram'. According to the expert, the nickname emerged from a long-forgotten joke about Jesus' initials.

The ancient Greeks were incredibly talented mathematicians—but they rarely used numbers in their math. ... In the 6th century BCE, the Greek alphabet used 24 letters.